Update to upstream unbatched PlainEditor #2345

Job	Run time
formatting	30s
cargo check (aarch64-android)	24s
cargo clippy (windows-latest)	5m 13s
cargo clippy (wasm32)	1m 58s
cargo clippy (macos-latest)	2m 31s
cargo check (msrv) (windows-latest)	1m 51s
cargo check (msrv) (macos-latest)	53s
Prime LFS Cache	6s
cargo clippy (ubuntu-latest)	3m 32s
cargo check (msrv) (ubuntu-latest)	49s
cargo check (msrv) (wasm32)	43s
cargo doc	43s
typos	4s
cargo test (wasm32)	25s
cargo test (windows-latest)	3m 35s
cargo test (macos-latest)	1m 54s
cargo test (ubuntu-latest)	4m 55s
	30m 6s

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